Sliding door.



NEWTON A. DAVIS, OF CHICAGO, ILLINOIS.

sLIDING noon. f

Specification of Letters Patent.

Patented March 3, 1908.

Application led June 22. 1906. Serial N0. 322.914

To all whom it may concern:

Be it known that I, NEWTON A. DAVIS, citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvementsin a Sliding Door, of which thefollowing is a specification.

This invention relates to improvements in sliding doors and moreespecially to the class of doors used on express and mail cars; and hasfor its object to provide a door that is weather' proof and can beeasily opened and closed.

In the drawing, Figure 1v is an elevation looking at the inside of acar, the door being partly open. Fig. 2 is a vertical section on line 2,Fig. 1, looking in the direction indicated by the arrow; and Fig. 3 is ahorizontal section on line 3, Fig. 1.

A may represent the body or one of the side Walls of a car; B thesliding door, and C the car-doorway.

The body ofthe sliding door may be of the usual construction and issupported in its suspended position by means of hangers 4 and 5 rigidlysecured to the door and having the grooved track or trolley rollers 6journaled therein, as best shown in Fig. 2. An angle plate consisting ofa vertical part 7 and a horizontal part 8 1s rigidly secured to theinside of the car, the track-rail 9 supporting the sliding movement ofthe door, being fastened to the horizontal part 8.

The track-rail 9 is provided with cut out notches or depressions 10,forming a low part in the track, as shown in Fig. 1. y notches consistof an incline 11 and a stop'- shoulder 12. position the track rollersrest in the lowest lfart of the notches in the track and abut againstshoulders 12, the bottom of the door resting on the sill 13 and back ofa ledge 14 formed thereon. The partly open position of the'door in Fig.1, corresponds to the posi.- tion-in Fig. 2, that is, the trolleyrollers being on the high part of 'the track and the bottom of the doorraised up proportionately from the sill and entirely out of contacttherefrom during the time that the rollers rest in the high part of thetrack in the opening and closing movement. When the rollers strike theincline in the trackon the closing movenient, the door gradually lowersuntil it is tightly closed at the bottom. By this arrangement it will bcreadily seen with what ease a sliding door may be opened and closedThese When the door is in its closedwithout the possibility of crampingor stick- 1n f An angle orgchannel-plate 15 is rigidly fastened to thetop of the door, the freeliange 16 being set away far enough from theback of thel door to provide a space 17 (Fi 2) for the loose engagementof a corresponding flange 18 of. an angle-plate 19 secured to thetop-part 20 of the door casing. The flanges 16 and 18. overlap eachother, the flange 16 fitting `loosely into the space 27 between the freeflange 18 andthe casing. The lianges 16 and 18 always overlap no matterwhether the door is open or closed, and in addition to making a weatherproof closure, also lock the door against a lateral displacement at thetop and the hanger rol ers from running off the track. The relativeposition of the flanges shown in Fig. 2, corres onds to the openposition of the door. hen the door is closed the flange 16 drops downand nearly contacts with the horizontal part of flange 18.

The reardoor post D (Fig. 3) has an-angle plate 21 secured thereto. Theweb 22 of this 'plate will conform to the contour of the surface coveredand has the inner edge turned at right angles to provide a free flange23, leaving a space 24 between the same and the adjacent inner lside ofthe door post. The corresponding edge of the door has a channel late 25mounted thereon.

-The inner side ange 26 of this plate overlaps the free flange 23 andoccupies the space 24, when the door is closed, as shown in Fig. 3. Thefront edge of the door will close into the door-post, not shown, in theusual manner. By this arrangement it will be readily seen that a slidingdoor can be made substantially weather-proof and cannot be affected byatmospheric changes, and

can be opened and closed with the greatest facility under all ordinaryconditions.

Having thus described my invention, what l claim is- 1. In a slidingdoor structure, the combination with the door and door casingspacedlaterally from each other, and a trolley rail secured to the latter andtrolley wheels to `the former, of a plate extending substantial'ly thewidth of the casing and having a horizontal portion underlying the underside of the upper part thereof and an u turned fiange occupyin the spacebetween c oor and` casing, and a p ate extending substantially the widthof the door and having a horizonltal ortion overlying the top of thedoor 'and embracing the-rear vertical ed e of the door a ependng flangeoverlapping the .other flange and interposed between the latter and thedoor-casing. v

5 2. In a sliding door structure, the combination with the door and doorcasings aced laterally from each other, of a channe iron having oneflange secured to the inner face of l the rear sidepost of thedoor-casing and the 10 'other flange received freely in the space leftbetween door and casing, and a channel iron with one flan e spaced fromt e face of the door so as to flange and the casing, when the door isclosed. In testimony whereof I afix my signature, in presence of twosubscribing witnesses.

NEWTON A. DAVIS. Witnesses:

J. P. DoNALsoN, L.' B. COUPLAND.

e received between such free

